Examlex
One of the oldest mysteries about the brain is why it seems to "shut down" for sleep yet it provides us with strange and colourful nightly dreams. Having mastered the material in Chapter 5, what answers are you able to provide regarding this mystery? What questions remain to be answered through further research?
Genes
Sequences of DNA that contain the instructions to build and maintain an organism's cells and pass traits to offspring.
Percent
A measure or ratio expressed as a fraction of 100.
Sex Chromosomes
Chromosomes that determine the sex of an organism, commonly referred to as X and Y chromosomes in many species.
Female Mammals
Members of the mammalian species characterized by the possession of mammary glands with which they feed their young, and typically possessing two X chromosomes.
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